﻿// ===================================
// <copyright>LogoUI Co.</copyright>
// <author>Vlad Spivak</author>
// <email>mailto:vlads@logoui.co.il</email>
// <created>21/00/10</created>
// <lastedit>Sunday, November 21, 2010</lastedit>

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the 'Software'), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
//
// <remarks>Part of this software based on various internet sources, mostly on the works
// of members of Wpf Disciples group http://wpfdisciples.wordpress.com/
// Also project may contain code from the frameworks: 
//        Nito 
//        OpenLightGroup
//        nRoute
// </remarks>
// ====================================================================================//


using System;
using System.Threading;
using System.Windows;
using System.Windows.Interactivity;

namespace LogoFX.Infra.Interactivity
{
    /// <summary>
    /// Fixes problem with accessing ActualWidth and ActualHeight in Silverlight
    /// </summary>
    public class MeasurementBehavior:Behavior<FrameworkElement>
    {

        #region ActualWidth attached property

        public static double GetActualWidth(DependencyObject obj)
        {
            return (double) obj.GetValue(ActualWidthProperty);
        }

        public static void SetActualWidth(DependencyObject obj, double value)
        {
            obj.SetValue(ActualWidthProperty, value);
        }

        public static readonly DependencyProperty ActualWidthProperty =
            DependencyProperty.RegisterAttached("ActualWidth", typeof (double), typeof (MeasurementBehavior),
                                                new PropertyMetadata(default(double), OnActualWidthChanged));

        private static void OnActualWidthChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            
        }

        #endregion

        #region ActualHeight attached property

        public static double GetActualHeight(DependencyObject obj)
        {
            return (double) obj.GetValue(ActualHeightProperty);
        }

        public static void SetActualHeight(DependencyObject obj, double value)
        {
            obj.SetValue(ActualHeightProperty, value);
        }

        public static readonly DependencyProperty ActualHeightProperty =
            DependencyProperty.RegisterAttached("ActualHeight", typeof (double), typeof (MeasurementBehavior),
                                                new PropertyMetadata(default(double), OnActualHeightChanged));

        private static void OnActualHeightChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            
        }

        #endregion
        protected override void OnAttached()
        {
#if SILVERLIGHT
            AssociatedObject.LayoutUpdated += OnLayoutUpdated;
#endif
            base.OnAttached();
        }
        protected override void OnDetaching()
        {
#if SILVERLIGHT
            AssociatedObject.LayoutUpdated -= OnLayoutUpdated;
#endif
            base.OnDetaching();
        }
        void OnLayoutUpdated(object sender, EventArgs e)
        {
            AssociatedObject.Dispatcher.BeginInvoke(new ThreadStart(delegate
            {
                SetActualWidth(AssociatedObject, AssociatedObject.ActualWidth);
                SetActualHeight(AssociatedObject, AssociatedObject.ActualHeight);
            }));
        }

    }
}
